City News Service reports the 71-year-old Kalajian had been married to the murdered woman’s sister. Investigators said Sunday that Kalajian had become estranged from the family and was distraught because Jan. 3 is the 5-year anniversary of his late wife’s death.

Detectives say Kalajian was at the Ontario cemetery when the couple arrived. Kalajian shot them with a handgun and then turned the weapon on himself.

An elderly woman who was with the couple was not harmed.

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This story corrects the spelling of the suspect’s name. It is Kalajian, not Karajan.